Michaelmas Day is a celebration of the feast of St. Michael and All Angels, which is held on September 29th each year. It is a popular tradition in many parts of the world, and it is celebrated by various names. Some synonyms for Michaelmas Day include Feast of St. Michael, St. Michael's Feast or the Fête de Saint-Michel. Additionally, Michaelmas Day is often referred to as the Autumnal Equinox or the beginning of the harvest season, as it marks the end of summer and the beginning of autumn. In some cultures, it is also known as Mabon or the Harvest Home, which represents the time of thanksgiving for the abundance of food and crops.